The HB-12A brings all the Championship technology from our HW line to larger displacement racing engines. With a Venturi size of 34mm, the HB-12A has been developed and calibrated to provide optimum fuel flow and performance for these powerful engines. This carburetor is similar to the HB-10A for use in non-X30 Super racing.

Repair Kit and Diaphragm Gasket for the carburetor:

RK 1 HB and DG 1 HB

Weight1 kg
Venturi Diameter


Throttle Bore Diameter


Racing Class

Product Line